fix: add protobuf installation explicitly #659

	---
	name: Validation

	on: [pull_request, push]

	jobs:
	validate:
	name: Validate files
	runs-on: ubuntu-latest

	steps:
	# Checks out a copy of your repository on the ubuntu-latest machine
	- name: Checkout code
	uses: actions/checkout@v3
	# Check yaml files comply to schema
	- name: Check YAML schema
	run: \|
	curl -L https://github.com/neilpa/yajsv/releases/download/v1.4.0/yajsv.linux.amd64 > yajsv
	chmod +x yajsv
	./yajsv -s schema.json sites/*.yaml
	- name: Setup python
	uses: actions/setup-python@v4
	with:
	python-version: 3.x
	- name: Install requirements
	run: pip install -r requirements.txt
	- name: Validate GOC and VOs
	run: \|
	./validate.sh
	- name: Check all configs can be generated
	run: \|
	exit_value=0
	for f in sites/*.yaml; do
	for c in "caso" "keystone" "cloudkeeper-os"; do
	echo "$c config for $f"
	if ! ./generate-config.py --config-type "$c" "$f" > /dev/null ; then
	echo "FAILED!"
	exit_value=1
	fi
	done
	done
	exit $exit_value
	- name: Check all VOs are in the deployment dir
	run: \|
	for f in sites/*.yaml; do
	for vo in $(yq -r ".vos[].name" < "$f"); do
	# remove FQAN stuff
	# shellcheck disable=SC2001
	vo=$(echo "$vo" \| sed 's#/$[^/]$/.#\1#')
	grep "$vo" deploy/vos.yaml > /dev/null \|\| (echo "VO $vo not configured" ; exit 1)
	done
	done

Provide feedback